Between Cepheids and the Cosmos

Between Cepheids and the Cosmos

The X-ray observations of three classical Cepheids produce a surprising result. At approximately the phase of maximum radius there is a sharp increase in X-ray flux above the normal “quiescent” level. The relation of this new upper atmosphere diagnostic to other phenonena above the photosphere is di...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Evans, Nancy Remage, Engle, Scott, Guinan, Ed, Neilson, Hilding, Marengo, Massimo, Matthews, Lynn, Guenther, Moritz
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Cepheid variables
Diagnostic systems
Photosphere
Upper atmosphere
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Beschreibung
Zusammenfassung:The X-ray observations of three classical Cepheids produce a surprising result. At approximately the phase of maximum radius there is a sharp increase in X-ray flux above the normal “quiescent” level. The relation of this new upper atmosphere diagnostic to other phenonena above the photosphere is discussed.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/201715203009